649433003 has 4 divisors (see below), whose sum is σ = 649938120. Its totient is φ = 648927888.

The previous prime is 649432961. The next prime is 649433011. The reversal of 649433003 is 300334946.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 300334946 = 2 ⋅150167473.

It is a cyclic number.

It is not a de Polignac number, because 649433003 - 2¹² = 649428907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (649433803) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 250625 + ... + 253202.

It is an arithmetic number, because the mean of its divisors is an integer number (162484530).

Almost surely, 2^649433003 is an apocalyptic number.

649433003 is a deficient number, since it is larger than the sum of its proper divisors (505117).

649433003 is a wasteful number, since it uses less digits than its factorization.

649433003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 505116.

The product of its (nonzero) digits is 23328, while the sum is 32.

The square root of 649433003 is about 25483.9754159354. The cubic root of 649433003 is about 865.9871577228.

Adding to 649433003 its reverse (300334946), we get a palindrome (949767949).

The spelling of 649433003 in words is "six hundred forty-nine million, four hundred thirty-three thousand, three".